/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/RigVMModel/RigVMController.h
typedef TBaseDelegate_ThreeParams< [FName](API\Runtime\Core\UObject\FName), [FRigVMGraphVariableDescription](API\Plugins\RigVMDeveloper\RigVMModel\FRigVMGraphVariableDescription), bool, bool > FRigVMController_RequestNewExternalVariableDelegate